openaire-library/searchPages/searchUtils/searchDownload.component.ts

import {Component, Input, ViewChild} from '@angular/core';
import {ActivatedRoute} from '@angular/router';
import {AlertModal} from '../../utils/modal/alert';
import {ReportsService} from '../../services/reports.service';
import {ModalLoading} from '../../utils/modal/loading.component';
import {PiwikService} from '../../utils/piwik/piwik.service';
import {EnvProperties} from '../../utils/properties/env-properties';
import {ErrorCodes} from '../../utils/properties/errorCodes';

import 'rxjs';
import {Subscriber} from "rxjs";

@Component({
  selector: 'search-download',
  template: `
    <a [attr.uk-tooltip]="'title: Download'
        + ((totalResults > csvLimit)?' the first 2000 ':' ')
        + 'results;'" [class]="isDisabled ? 'uk-disabled uk-link-muted' : 'uk-link-text'"
       (click)="downloadfile(downloadURLAPI+'?format=csv'+csvParams,type+'-report-'+((totalResults > csvLimit)?'2000 ':totalResults))">
      <span class="uk-icon">
        <svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg" icon="download"
             ratio="1">
          <polyline fill="none" stroke="#000" points="14,10 9.5,14.5 5,10"></polyline>
          <rect x="3" y="17" width="13" height="1"></rect>
          <line fill="none" stroke="#000" x1="9.5" y1="13.91" x2="9.5" y2="3"></line>
        </svg>
      </span>
      Download Results
    </a>
    <modal-loading></modal-loading>
    <modal-alert #AlertModalCsvError></modal-alert>
  `
})

export class SearchDownloadComponent {
  @Input() isDisabled: boolean = false;
  @Input() totalResults: number = 0;
  @Input() csvParams: string;
  @Input() type: string;
  @ViewChild(AlertModal) alertApplyAll: AlertModal;
  downloadURLAPI: string;

  public csvLimit: number = 0;
  
  @ViewChild(ModalLoading) loading: ModalLoading;
  // Alert box when something is wrong with CSV requests
  @ViewChild('AlertModalCsvError') alertCsvError;
  public isPiwikEnabled;
  public properties: EnvProperties;
  public errorCodes: ErrorCodes = new ErrorCodes();
  subscriptions = [];
  constructor(private route: ActivatedRoute, private _reportsService: ReportsService, private _piwikService: PiwikService) {
  }
  
  ngOnInit() {
    this.subscriptions.push(this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;
        this.csvLimit = data.envSpecific.csvLimit;
        this.downloadURLAPI = data.envSpecific.csvAPIURL;
        this.isPiwikEnabled = data.envSpecific.enablePiwikTrack;
      }));
  }

  ngOnDestroy() {
    this.subscriptions.forEach(subscription => {
      if (subscription instanceof Subscriber) {
        subscription.unsubscribe();
      }
    });
  }
  
  denialOfDownload() {
    this.alertApplyAll.cancelButton = true;
    this.alertApplyAll.okButton = false;
    this.alertApplyAll.alertTitle = "Download Results in CSV";
    this.alertApplyAll.message = "Sorry, but the results are too many! Use the api instead!";
    this.alertApplyAll.cancelButtonText = "Ok";
    this.alertApplyAll.open();
    
    console.error("Error downloading file. Results are too many!");
    //this.handleError("Error downloading file. Results are too many!", err);
  }
  
  downloadfile(url: string, filename: string) {
    //var newWindow = window.open("", "_parent");
    //var newWindow = window.open();
    //console.log("Downloading file: "+ url);
    this.openLoading();
    this.setMessageLoading("Downloading CSV file");

    this.subscriptions.push(this._reportsService.downloadCSVFile(url).subscribe(
      data => {
        this.closeLoading();
        //window.open(window.URL.createObjectURL(data),filename+".csv");
        //console.info("Fill window with data for csv");
        if (typeof document !== 'undefined') {
          var url = window.URL.createObjectURL(data);
          var a = window.document.createElement('a');
          window.document.body.appendChild(a);
          a.setAttribute('style', 'display: none');
          a.href = url;
          a.download = filename + ".csv";
          a.click();
          window.URL.revokeObjectURL(url);
          a.remove(); // remove the element
        }
        //newWindow.location.assign(window.URL.createObjectURL(data));
        
        //window.location.href = window.URL.createObjectURL(data);
        
        if (this.isPiwikEnabled && (typeof document !== 'undefined')) {
          this.subscriptions.push(this._piwikService.trackDownload(this.properties, url).subscribe());
        }
      },
      error => {
        //console.error("Error downloading the file.");
        this.handleError("Error downloading file: " + filename, error);
        
        //newWindow.close();
        this.closeLoading();
        this.confirmOpenCsvError();
      }/*,
          () => {
            console.log('Completed file download.');
            //setTimeout(function(){ newWindow.close(); }, 500);
          }*/
    ));
  }
  
  
  public openLoading() {
    if (this.loading) {
      this.loading.open();
    }
  }
  
  public closeLoading() {
    if (this.loading) {
      this.loading.close();
    }
  }
  
  public setMessageLoading(message: string) {
    if (this.loading) {
      this.loading.message = message;
    }
  }
  
  public confirmOpenCsvError() {
    this.alertCsvError.cancelButton = false;
    this.alertCsvError.okButton = true;
    this.alertCsvError.alertTitle = "ERROR DOWNLOADING CSV FILE";
    this.alertCsvError.message = "There was an error in csv downloading. Please try again later.";
    this.alertCsvError.okButtonText = "OK";
    this.alertCsvError.open();
  }
  
  private handleError(message: string, error) {
    console.error("Search Download (component): " + message, error);
  }
}